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We calculate the effect of the P, CP-odd electron-nucleon interaction on theelectric dipole moment of the $^{199}$Hg atom by evaluating the nuclear spinmatrix elements in terms of the nuclear shell model. It is found that theneutron spin matrix element of the $^{199}$Hg nucleus is $\langle \Psi |\,\sigma_{nz} | \Psi \rangle \approx -0.4$ with a dominant configuration of$p_{1/2}$ orbital neutron. We also derive constraints on the CP phases ofHiggs-doublet models, supersymmetric models, and leptoquark models from thelatest experimental limit $|d_{\rm Hg}| < 7.4 \times 10^{-30}e$ cm.

Electric dipole moment of $^{199}$Hg atom from P, CP-odd electron-nucleon interaction